Color
#5f37be
#5f37bergb(95, 55, 190)hsl(258, 55%, 48%)oklch(0.468 0.198 290.2)Colors that go with #5f37be
Charcoal, Royal Blue and Cobalt Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #5f37be: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #5f37be's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #5f37be: 4 real palettes, including Zillow's brand system and Unilever's brand system, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #5f37be: 4 real palettes, including Blue Mono and Coca-Cola's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #5f37be in 9 real palettes, including Gemstone and Wells Fargo's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #5f37be: 7 real palettes, including Linkedin's brand system and Unilever's brand system, as the lead colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #5f37be: 5 real palettes, including Datadog's brand system and Campbell's's brand system, as the accent.
Midnight Blue #191970
shipped9 real palettes, including Kraken's brand system and Purina Pro Plan's brand system put Midnight Blue beside #5f37be, as the lead colour.
Real palettes that use #5f37be
Tints & shades
Harmonies
Contrast
| #5f37be as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.56:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.78:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5f37be as the background.
Brands using this color
Fonts for this mood
#5f37be reads as cool, modern. The font library is tagged with the same vocabulary:
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #5f37be and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/5f37be-ad9cc4-dfc44e-291f2d-e9ebf1?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md